How would you rank the different forms of cricket in terms of importance?

Criteria:

If it helps, imagine that of the choices you select, the first choice is ring fenced forever and untouchable whilst the last choice is banished from the world and booted out into the cricketing wilderness.

"It has been said of the unseen army of the dead, on their everlasting march, that when they are passing a rural cricket ground the Englishman falls out of the ranks for a moment to look over the gate and smile."